Position brake for sewing machines



Sept. 2, 1930. s. KQCH I 1,774,978

POSITION BRAKE FOR SEWING MACHINES Filed April 4. 1928 INVENTOR Sam m6} I treddle 23. A rod 36: is pivotally secured as at 37 to theextended extremity of the arm -'and similarly secured as at 38 to the lever V 39 pivotally secured as at 40 to a'bracket 41 attached to the table 10. An engaging rod 42 is pivotally secured as at 43 intermediately to the'lever 39Qat itslower extremity, and is extended vertically therefrom through an aperture 44 formed in the table 10 an dis slidably mounted in the'extended elements 45 V. and 46 of a bracket47 secured-to the table 10. Q The engaging rod :42 is-provi'dedwith a liorizjontallyiextended pqrtion48 haying v is vertically extendedfree extremity 49. An

expansion spring 50 is'positioned or wound co-axial on the main portion 'of tlie engaging 7 o intermediate the elemen 5M 1 "the". bracket '47 and the .collarr5'lsecured to the engaging rod 43, as, a [means of' normally holding the free extremity"49 jof engaging rod 4 in engeg mentwit-h thes i0 v5 e ve entie e h e 2 issubtane rtially of segment or are shape construction I n pi m dih r in pe tu e .3 a d 5.4

adapted to receive the threaded members 5 '7 andg56 respectively,*bo lts, screws or thelike adapted o, eng g 1n l p r tesim an 58 formed inth'e" retainer ,59, .ofsirnilarjsegmen-t she-p q struc nyes means fr t c the shoe 52 to the hand wheel -6Qof the sew ing a h ne- It s n e s j o ha t es 52 may b i zte h i o t n gwh ,6 a

any desired portion thereof for the purpose askhereinafter set forth. As iscustomary in sewing. machines the hand wheel 60 may be turned; freely by loosening theend of the spindle 22, w

Q l' -The shoe '52 is provided with ieitaperefdsurface 61,.tape'red relativeto-the rear side of the shoe, and with ajtapered surface relativeto the end edge of, {the shoe, the surface 65'being arranged to-meet surface 61, and the i if shoe 52 hasseoured thereto. as :at 62 by bolts,

screws or thelike, astopmember 63 preferably of comparatively'lightly compresedfelt,

' positioned adjacent to theoutermo-st portion of the tapered "surface 61. "Sunk-in from the i surface 61 is a groove 66:

The above described construction is such as will permit the free extremity49 of the'enfgaging rod 42 to first-engage thetapered'sur- .fa'ce 61or 65 offthe stop'5 2,when the treadle 23 is released'by the foot'of the operator and allowedto' move]upwar'ds and"which will 'permit the engaging rod 42 to next engage the sto'p 63 and rest in groovefifi asga meansof providing a stop for the'purpose of stopping V ithe sewing machine: ,lt isunderstood that the shoe v 52 maybeattached to thehand wheel '60, and, relatively positioned thereon or' the 7 relative position of the wheel 60 on the spindle 22 adjusted as a means of stopping the sewingmachine so as topositi'on the needle of the sewing machine in cloth being sewn or disengagedwith the said cloth for the purpose as above set forth.

Attention is directed that extremity 49 is bent outwards by the tapered surfaces 61 or 65 which acts to stop the wheel 60. Of course the wheel does not come to a complete stop until 49 strikes stop 63' and falls into groove 66. The brake 27 is so arranged as to merely slow down section19 when applied to aid extremity 49' to properlystop the wheel 60.

It is to be, under-stood that when it is intendedgto use my; position brake device, an butti g lever; 8ip eted t 69 n bracket 70, is swung in an engaging position as shown in Fig. 10f the drawings. This lever stops =n-eau1e 2a=before the-latter completes its final upward motionpthe reby preventing brake 'leve'r27' from touching section 19 and allowing the sewingmaehine to be stoppedby the engagingrod42;

ln c e as d sired to Place my P sit brake into inoperative position, ithe abutting lever 8ds swung away from the treadle 23 and tlie'hookedextremity 71 of a slide bar 72 is pulled outwardly,- Slide .bar 7 2 is secured to the'bottom ,of tablQ 11 by Strap 7 3and is provided with a tapered projection 74 which i edeplt dr e ga eth lerenwh h slide bar ;71ji-s P1 led outwardly, lever 39 is rookedand the free extremity49 of bar 42 is depressed below'theshoe 52. V

, I In operation of the sewing machine, the treadlel23ispressed down for moving arm 35, rod;36 andextremity49 down so as to permit rotation of wheel--60, and for moving member 32- down for; pivoting arm 27 about 28 so as to press clutch sections 16- and19 together transmitting rotation to the sewing machine.

1 Havingthus described my invention what I claim as new and desire to secure by United States Letters, Patent is:

l. Iii-combination with the hand wheel of a sewing machine an arcua'telshoe arranged for attachment on the hand wheel and formed with an outward tapered surface sloping'outwards from the front to the rear, a bottom tapered surface sloping outwards from thef'bottom .up and meeting said tapered surface, a vertical groove to the rear of the tapered surfaces, and a stop member attached on the shoe to the rear of the vertical groove.

2. In combination with the hand wheel of a sewingmachine, an arcuate shoe arranged tapered surfaces; and a stop member' at- I for attaehmehton'the hand wheel andioi h'edi with an outward tapered surface'sloping 01113 7' wards from'the' front to thei'ear, abottom tapered surface sloping outwards fromlthe I bottom up. and meeting said taperedysur face, a vertical groove to the rear lofthe taohed on the shoe to the rear-ofthe vertical signature. "157V I groove, and a verticall o'dgarlangedtofmove '7 10 t a V a to finallyengage 1i1'thevert1ca1grooyerfor stopping rotation-{0f the hand wheel. t I have 'affixed my upwards v against said tapered j surfaces and In testimony; whereof 

